From a23c941d8bb37df1c031530acbd4ab754bf76859 Mon Sep 17 00:00:00 2001
From: Nipunn Koorapati <nipunn@dropbox.com>
Date: Thu, 2 Jul 2020 06:05:24 +0000
Subject: [PATCH] Support simple 8 bit ansi escape sequences

See https://en.wikipedia.org/wiki/ANSI_escape_code#8-bit
Support standard and high intensity colors. The default
ncurses colors ARE the high intensity colors - represented
via an 8 bit ansi escape sequence here.
---
 watch.c | 52 ++++++++++++++++++++++++++--------------------------
 1 file changed, 26 insertions(+), 26 deletions(-)

diff --git a/watch.c b/watch.c
index c202ed7b..e0e9950e 100644
--- a/watch.c
+++ b/watch.c
@@ -138,36 +138,36 @@ static void init_ansi_colors(void)
 
 
 static int process_ansi_color_escape_sequence(char** escape_sequence) {
-	// process SGR ANSI color escape sequence
-	// Eg 8-bit
-	// 38;5;⟨n⟩  (set fg color to n)
-	// 48;5;⟨n⟩  (set bg color to n)
-	//
-	// Eg 24-bit (not yet implemented)
-	// ESC[ 38;2;⟨r⟩;⟨g⟩;⟨b⟩ m Select RGB foreground color
-	// ESC[ 48;2;⟨r⟩;⟨g⟩;⟨b⟩ m Select RGB background color
-	int num;
+    // process SGR ANSI color escape sequence
+    // Eg 8-bit
+    // 38;5;⟨n⟩  (set fg color to n)
+    // 48;5;⟨n⟩  (set bg color to n)
+    //
+    // Eg 24-bit (not yet implemented)
+    // ESC[ 38;2;⟨r⟩;⟨g⟩;⟨b⟩ m Select RGB foreground color
+    // ESC[ 48;2;⟨r⟩;⟨g⟩;⟨b⟩ m Select RGB background color
+    int num;
 
-	if ((*escape_sequence)[0] != ';')
-		return 0; /* not understood */
+    if ((*escape_sequence)[0] != ';')
+        return 0; /* not understood */
 
-	if ((*escape_sequence)[1] == '5') {
-		// 8 bit! ANSI specifies a predefined set of 256 colors here.
-		if ((*escape_sequence)[2] != ';')
-			return 0; /* not understood */
-		num = strtol((*escape_sequence) + 3, escape_sequence, 10);
-		if (num >= 0 && num <= 7) {
-			// 0-7 are standard colors  same as SGR 30-37
-			return num + 1;
-		}
+    if ((*escape_sequence)[1] == '5') {
+        // 8 bit! ANSI specifies a predefined set of 256 colors here.
+        if ((*escape_sequence)[2] != ';')
+            return 0; /* not understood */
+        num = strtol((*escape_sequence) + 3, escape_sequence, 10);
+        if (num >= 0 && num <= 7) {
+            // 0-7 are standard colors  same as SGR 30-37
+            return num + 1;
+        }
 
-		// Remainder aren't yet implemented
-		// 8- 15:  high intensity colors (as in ESC [ 90–97 m)
-		// 16-231:  6 × 6 × 6 cube (216 colors): 16 + 36 × r + 6 × g + b (0 ≤ r, g, b ≤ 5)
-		// 232-255:  grayscale from black to white in 24 steps
-	}
+        // Remainder aren't yet implemented
+        // 8- 15:  high intensity colors (as in ESC [ 90–97 m)
+        // 16-231:  6 × 6 × 6 cube (216 colors): 16 + 36 × r + 6 × g + b (0 ≤ r, g, b ≤ 5)
+        // 232-255:  grayscale from black to white in 24 steps
+    }
 
-	return 0; /* not understood */
+    return 0; /* not understood */
 }